Oil burner



H. c. LITTLE Feb. 14, 1933.

UIL BURNER -Fi1edJan- 27,1930 zsneets-sheet 1 ATTORNEY Feb. 14, i933. H Ig, MT1-Lg pgl@ OIL BURNER Filed Jan. 27. 1930 2 Sheets-Sheet 2 IN V EN TOR.

HHRY 1:'. LITTLE 73 BY @L ATTORNEY) Patented Feb. 14, 1933 AuNrrED s'ra'rasv PATENT oFrlcE Thisinvention relates to improvements in oil burners. A

The principal object of lthis invention 1s to produce an oil burner which will burn a u 5 liquid fuel in an eilicient manner.

, A. further object is to produce a device of this character which may be employed whereever it is desired to obtam heat.

A further object is to produce a device Iof` 10. this character which is economical tomanufacture.'

A still further object is to produce a device -wherein a perfect combustion takes place and pne wherein the operation is practically noiseess.

A further object is to provide means whereby a thorough mixing of the gas and the air necessary plis'hed.

Other objects and advantages will be apparent during the course ofthe following descri tion.

In t e accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same, f

Figure I cross-section` of a is a vertical burner as the same would be 'applied to a rnace pot, Figure II'is a side elevation on a reduced scale of my complete burner and partly broken away andV l' Figure III is a top plan view of my bur-ner as the same would appear when positioned in an ash pit.

` Applicant is aware of the fact that-man forms of oil burners have been used, whic oil burners depend upon the gassif ing of the oil dueto heat created within t e burner. This, type of burner, is in contradistinction to that type of burner wherein the oil is sprayed into the furnace and where difficul- Yty is experienced inproducin a perfect combustion due principally to t e diliculty in combining the secondary air with the r'\ch to 'support combustion is accomgases generated by the heatingof .the oil, re:-

. sulting in' back tiring and a very noisy burner.

This back firing also created a frying action ofthe oil which adds to the noise. Further,

this spasmodic flaring of the burner resulted 450v in oor combustion, resulting in much smoke. pplicant has therefore produced a burner of thls type wherein the secondary air admitted is proportional to the flame or draft passing through the throat of the burner, 5o

and has further provided means for mixing this air with the gases to create a more combustible mixture,V or one which would burn without noise 0r smoke. J Referring to the dralwings, the numeral 5 60 y.designates the fire vpot of an ordinary furnace, and the numeral 6 the ash pit thereof. It is within the ash pit thatmyburner is positioned and consists of a substantially rectangular housin 7, at the front end of which 65 is a removable p ate 8,- and nearthe rear end thereof and in the top is positioned a deector plate 9.` The housing 7 is perforated along its sides and rear portion as shown at 1l, and has-a slopingbottom 12. The bottom 70 slopes from side to side andy also from front to back, with' the result that oil which enters the housing through the pipe 13 will How' toward-the rear thereof. At 14 I have shown an upstanding thimble having a perforated y7:5 cap 16, the purpose of which will be later seen.

By referring now to Figure I. it will be noted that the deilector plate 9 has a recess 17 formed upon its top surface and entirely 80 surrounding the opening 18 formed within the delector plate 9. Mounted on thede- Hector plate 9 is an auxiliary plate 19 having an opening 21 therethrough correspondis anair passage 23 between the. plates 9 and 90 lng to the opening 18in the plate 9. These 85 through the pipe toward the plate 19,

' corresponds to the recess .In order' to seal the plate 19 to the 19. It will also be noted that a recess 24 is formed in the under side of the plate 19 and 17 of the plate 9. fire pot 5 I employ any plastic material as shown at 26, the purpose of which is obvious.

The operation of my burner is, as follows:

Assuming that oil is permitted to flow 13 'into the housing 7 the oil will run by gravity toward the rear of the housing or to a point surrounding the thimble 14. Any means of ignition may be employed for igniting the oil. As soon as the oil commences to burn, vair will be induced through the openings 11, as well as'through the .openings in the cap 16. The flames of the burning oil will now lpassupwardly through the throat of the burner,fat which point secondary air will enter through the space 23 between the plates 9 and 19, and due to the heat reflected by the top of the plate 9 the air entering will be heated and expanded thus reducing itsvelocthis reduced velocity ity and resultant noise, also permits the air to beheated to a higher degree and as a result there is abetter mixing of the heated air and the products of combustion, with the result that when theY combined gases reachthe throat, they will .130 beintimately mixed and will burn as a perfect combustible mixture..

The air coming through the cap 16 will be sufficient to maintaina small fire within the housing for the purpose of keeping up. gas generation.

It might be said therefore that after the 'burner is in operation the gas within the housing is too rich toburn and only burns at a point about the cap 16 and at a` point above .the throat ofthe burner. Therefore, after theburner is in full operation the fire leaves the housing and is maintained only at a point above the burner throat, and at this point therich gases have all been thoroughly with the first mentioned plate to form an annular air inlet and having a similar annular recess formed on its' underside .which coacts with the first mentioned .recess to form an an' nular expansion chamber surrounding the said outlet, whereby the velocity of the incoming air will be reduced prior to its'entering the said outlet which will eliminate noise and result in a higher heating of the 811.

vIn testimony whereof I aiiix m signature. y

HARRY C. ITTLE.

mixed with the air, andthe result is a perfect and silent combustion.

It is to Jbe understoodsthat the form of myA invention herewith hown `and described is to bel taken as a preferred example of the same the maf,

and that various changes relative to arrangement of parts.

terial, sizje, shape and may b e resorted'to without departing from the invention or the scope of the the spirit of subjoined claim; 1

Having thus claim p p An. oil burner comprising. an open-topped 'generating and mixing chamberhaving oil supply means therefor, ing annular vd eilector platepositioned onthe open top of said chamber and defining a central outlet 'therefrom` the. inner upper surface of the said plate having an annular re`- `described my invention,` I

an inwardly extendcess extending outwardly la lsubstantial'distance from the said outlet, a second l annular .plate spaced l bove and mounted coaxially 

